What makes understanding and regulating dietary supplements so complex is that many different substances are lumped together in one group. Dr. Jeffrey Blumberg, senior scientist and director of the Antioxidants Laboratory at the Human Nutrition Research Center on Aging at Tufts University, contends that including all of these different substances under one heading is "worse than comparing apples with oranges."
As discussed in chapter 2, dietary supplements are not foods, but they are regulated in a way that is closest to the way the FDA regulates foods. They are not drugs, but they are marketed in ways that are similar to some over-the-counter and prescription drugs. For the purposes of this chapter, I have divided dietary supplements into vitamin and mineral supplements, herbal and botanical supplements, and other supplements.
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